<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="uname" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="item.id">
          <td>{{ index + 1 }}</td>
          <td>{{ item.uname }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="del(item.id)">删除</button>
            <button @click="edit(item.id)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
// 一定一定要记得 数据驱动视图
export default {
  data() {
    return {
      uname: "",
      age: "",
      gender: "",
      id: "",
      isEdit: true,
      arr: [
        {
          id: 1,
          uname: "2",
          age: 3,
          gender: "男",
        },
        {
          id: 2,
          uname: "2",
          age: 3,
          gender: "女",
        },
      ],
    };
  },
  methods: {
    add() {
      if (this.isEdit) {
        const newObj = {
          id: +new Date(),
          uname: this.uname,
          age: this.age,
          gender: this.gender,
        };
        this.arr.push(newObj);
        this.uname = "";
        this.age = "";
        this.gender = "";
        this.isEdit = true;
      } else {
        this.isEdit = true;
        this.arr.map((item) => {
          if (item.id === this.id) {
            item.uname = this.uname;
            item.age = this.age;
            item.gender = this.gender;
          }
        });
      }
      this.uname = "";
      this.age = "";
      this.gender = "";
      this.id = "";
    }, 
    edit(id) {
      this.isEdit = false;
      const obj = this.arr.find((item) => item.id === id);
      this.uname = obj.uname
      this.age = obj.age
      this.gender = obj.gender
      this.id = obj.id
    },
    del(id) {
     this.arr = this.arr.filter((item) => item.id !== id);
    },
  },
};
</script>
